Both involve risk but the nature of risking their money is different.

In gambling, mostly rely on luck in order to profit from every round. There is no thinking required since you either push slots and pray; or you play card games that both require some level of thinking and luck.

In trading, a person is required to analyze both the internal and external factors of an investment in order to arrive at a decision whether to purchase or not. Traders also rely on their experience whether to purchase a certain investment or to sell their current investments. Though both rely on luck, trading cryptocurrencies is considered to be more technical since you can lower your risks of losing your investments.